Full title: "History of the expedition under the command of Captains Lewis and Clark, to the sources of the Missouri: thence across the Rocky mountains and down the river Columbia to the Pacific ocean: performed during the years 1804-5-6: by order of the government of the United States, prepared for the press by Paul Allen, Esquire."

From the Colton Storm catalogue: "First authorized and complete account of the most important western exploration and the first of many overland narratives to follow. Less than 2000 copies printed of the original edition."